diff --git a/br-ext-chip-hisilicon/board/hi3516av100/kernel/patches/20-of_mdio.c.patch b/br-ext-chip-hisilicon/board/hi3516av100/kernel/patches/20-of_mdio.c.patch
new file mode 100644
index 00000000..a4099533
--- /dev/null
+++ b/br-ext-chip-hisilicon/board/hi3516av100/kernel/patches/20-of_mdio.c.patch
@@ -0,0 +1,32 @@
+diff --git a/home/goody/of_mdio.c b/output/build/linux-4.9.37/drivers/of/of_mdio.c
+index 262281bd..5f338cd6 100644
+--- a/drivers/of/of_mdio.c
++++ b/drivers/of/of_mdio.c
+@@ -25,6 +25,11 @@
+ MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+ MODULE_LICENSE("GPL");
+ 
++int higmacphy = 0;
++EXPORT_SYMBOL(higmacphy);
++MODULE_PARM_DESC(higmacphy, "Select phyaddr for higmac driver.\n");
++module_param_named(higmacphy, higmacphy, int, 0600);
++
+ /* Extract the clause 22 phy ID from the compatible string of the form
+  * ethernet-phy-idAAAA.BBBB */
+ static int of_get_phy_id(struct device_node *device, u32 *phy_id)
+@@ -248,7 +256,14 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
+ 		if (of_find_property(child, "reg", NULL))
+ 			continue;
+ 
+-		for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
++		if (higmacphy>0) {
++			dev_info(&mdio->dev, "higmacphy addr is set in kernel arguments: phy %s at address %i\n",
++				 child->name, higmacphy);
++
++			if (of_mdiobus_child_is_phy(child))
++				of_mdiobus_register_phy(mdio, child, higmacphy);
++		}
++		else for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
+ 			/* skip already registered PHYs */
+ 			if (mdiobus_is_registered_device(mdio, addr))
+ 				continue;